diff --git a/src/Admin/RemoveDashboardWidgets.php b/src/Admin/RemoveDashboardWidgets.php
index af6d18a..ec6e10e 100644
--- a/src/Admin/RemoveDashboardWidgets.php
+++ b/src/Admin/RemoveDashboardWidgets.php
@@ -4,9 +4,10 @@
 
 namespace Fire\Admin;
 
-class RemoveDashboardWidgets
+final class RemoveDashboardWidgets
 {
-    protected array $ids = [];
+    /** @var string[] */
+    protected readonly array $ids;
 
     public function __construct(string ...$ids)
     {
@@ -16,6 +17,7 @@ public function __construct(string ...$ids)
     public function register(): self
     {
         add_action('wp_dashboard_setup', [$this, 'remove']);
+
         return $this;
     }
 
diff --git a/src/Core/CacheBustScripts.php b/src/Core/CacheBustScripts.php
index 8ef75ed..6f6101e 100644
--- a/src/Core/CacheBustScripts.php
+++ b/src/Core/CacheBustScripts.php
@@ -6,12 +6,12 @@
 
 use InvalidArgumentException;
 
-class CacheBustScripts
+final class CacheBustScripts
 {
     protected int $hashLength = 10;
 
     /** @var string[] */
-    protected array $validHosts;
+    protected readonly array $validHosts;
 
     public function __construct(string ...$validHosts)
     {
@@ -30,6 +30,7 @@ public function register(): self
 
         add_filter('script_loader_src', [$this, 'src']);
         add_filter('style_loader_src', [$this, 'src']);
+
         return $this;
     }
 
@@ -57,12 +58,14 @@ public function src(string $src): string
         // Remove version and append to filename
         $src = remove_query_arg('ver', $src);
         $ver = substr(sha1($ver), 0, $this->hashLength);
+
         return preg_replace('/\.(js|css)(\?.*)?$/', ".$ver.\$1\$2", $src);
     }
 
     public function setHashLength(int $length): self
     {
         $this->hashLength = $length;
+
         return $this;
     }
 
diff --git a/tests/Admin/RemoveDashboardWidgetsTest.php b/tests/Admin/RemoveDashboardWidgetsTest.php
index 84eee33..c1b6947 100644
--- a/tests/Admin/RemoveDashboardWidgetsTest.php
+++ b/tests/Admin/RemoveDashboardWidgetsTest.php
@@ -14,6 +14,7 @@ final class RemoveDashboardWidgetsTest extends TestCase
     public function testActionsAdded(): void
     {
         $instance = (new RemoveDashboardWidgets())->register();
+
         $this->assertIsInt(has_action('wp_dashboard_setup', [$instance, 'remove']));
     }
 
diff --git a/tests/Core/CacheBustScriptsTest.php b/tests/Core/CacheBustScriptsTest.php
index b13296e..27943e5 100644
--- a/tests/Core/CacheBustScriptsTest.php
+++ b/tests/Core/CacheBustScriptsTest.php
@@ -18,7 +18,9 @@ final class CacheBustScriptsTest extends TestCase
     public function testFiltersAdded(): void
     {
         when('is_admin')->justReturn(false);
+
         $instance = (new CacheBustScripts($this->current))->register();
+
         $this->assertIsInt(has_filter('script_loader_src', [$instance, 'src']));
         $this->assertIsInt(has_filter('style_loader_src', [$instance, 'src']));
     }
@@ -26,7 +28,9 @@ public function testFiltersAdded(): void
     public function testFiltersNotAddedForAdmin(): void
     {
         when('is_admin')->justReturn(true);
+
         $instance = (new CacheBustScripts($this->current))->register();
+
         $this->assertFalse(has_filter('script_loader_src', [$instance, 'src']));
         $this->assertFalse(has_filter('style_loader_src', [$instance, 'src']));
     }
@@ -34,18 +38,21 @@ public function testFiltersNotAddedForAdmin(): void
     public function testNoValidHosts(): void
     {
         $this->expectException(InvalidArgumentException::class);
+
         new CacheBustScripts('//');
     }
 
     public function testFallbackHosts(): void
     {
         when('home_url')->justReturn($this->current);
+
         $this->assertSame(parse_hosts($this->current), (new CacheBustScripts())->validHosts());
     }
 
     public function testLocal(): void
     {
         $this->functions();
+
         $bust = new CacheBustScripts($this->current);
 
         $this->assertSame(
@@ -75,20 +82,25 @@ public function testLocal(): void
     public function testLocalWithoutVersion(): void
     {
         $this->functions();
+
         $bust = new CacheBustScripts($this->current);
+
         $this->assertSame($src = 'https://domain.com/file.js?a=b&c=d', $bust->src($src));
     }
 
     public function testExternal(): void
     {
         $this->functions();
+
         $bust = new CacheBustScripts($this->current);
+
         $this->assertSame($src = 'https://google.com/fonts.css', $bust->src($src));
     }
 
     public function testLength(): void
     {
         $this->functions();
+
         $bust = (new CacheBustScripts($this->current))->setHashLength(5);
 
         $this->assertSame(
@@ -100,7 +112,9 @@ public function testLength(): void
     public function testBadSrc(): void
     {
         $this->functions();
+
         $bust = new CacheBustScripts($this->current);
+
         $this->assertSame($src = '//', $bust->src($src));
     }